mcpbeat Sign in

Sendinel MCP Server

not responding

Sendinel is listed as active in the registry but did not answer our last check. 21 572 installs a week from npm.

AI-controlled email ops for campaigns, contacts, segments, analytics, and sending.

The linked repository no longer exists on GitHub — it was deleted or made private.

Installs per day peak 5 203 · avg 1 112 · +285% w/w
a month agotoday
Uptime history 91 days of history · worst day 0%
91 days agonow
11.0%
Uptime 24h
10 of 91 checks
—
Tools
hidden behind auth
762 ms
Response time
average over 24h
21 572
Installs / week
npm and PyPI

Sendinel does not always answer

Over the last week it answered 8.8% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 12 min ago.

run in your terminal
claude mcp add mcp-server --transport http https://sendinel.ai/mcp
Settings → Connectors → Add custom connector, then paste this address
https://sendinel.ai/mcp
~/.codex/config.toml
[mcp_servers.mcp-server]
url = "https://sendinel.ai/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "mcp-server": {
      "url": "https://sendinel.ai/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "mcp-server": {
      "type": "http",
      "url": "https://sendinel.ai/mcp"
    }
  }
}

Endpoints

URLTransportStateLatencyChecked
https://sendinel.ai/mcp streamable-http answering 72 ms 12 min ago

Alternatives to Sendinel

same job, measured the same way
Mailercloud
by mailercloud-com

AI tools for Mailercloud email marketing: campaigns, contacts, templates, sending & analytics.

answering
Nitrosend
by nitrosend

AI-native email marketing. Campaigns, automations, transactional, contacts, and analytics.

87 installs/wk answering
Nudgen
by nudgen

Manage email campaigns, contacts, brand settings, and analytics with Nudgen AI email retention.

answering
Kooga
by kooga

AI marketing for businesses: SEO content, AI visibility, email campaigns and analytics.

answering
MCP Mailtrap
by pijusz

MCP server for the Mailtrap email platform — analytics, sending, contacts, sandbox

71 installs/wk local only
RuSender
by rusender

Manage email campaigns, contacts and deliverability analytics in RuSender from an AI assistant.

answering
Mailzzy
by mailzzy

Email marketing: campaigns, audiences, contacts, segments, templates and reports.

answering
MisarMail
by misar-mail

Full email marketing platform: inbox, campaigns, contacts, templates, and analytics via MCP.

55 tools answering

Sendinel — questions

Answers built from our own checks of this server.

Is Sendinel working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 10 of 91 checks got a reply (11.0%), average response time 762 ms. The bar chart above shows every period we have measured.
Is Sendinel still maintained?
The linked repository no longer exists on GitHub — it was deleted or made private. We show this because it changes what you can expect: an unmaintained server may keep answering for months and then stop without warning.
The registry lists Sendinel as active — why does it not respond?
The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.
How do I connect Sendinel?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Sendinel need an API key?
No. Sendinel completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. This is what we observed, not what the docs claim.
How fast is Sendinel?
It answers our handshake in 762 ms on average, which is faster than 10% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.
How many people use Sendinel?
The npm package @sendinel/mcp-server was installed 21 572 times in the last week. Week over week that is +285%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.